123544444221011 has 8 divisors (see below), whose sum is σ = 134781295519344. Its totient is φ = 112308515953920.

The previous prime is 123544444221001. The next prime is 123544444221031. The reversal of 123544444221011 is 110122444445321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123544444221011 - 2⁴² = 119146397709907 is a prime.

It is a super-2 number, since 2×123544444221011² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123544444221001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230477930 + ... + 231013343.

It is an arithmetic number, because the mean of its divisors is an integer number (16847661939918).

Almost surely, 2^{123544444221011} is an apocalyptic number.

123544444221011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123544444221011 is a deficient number, since it is larger than the sum of its proper divisors (11236851298333).

123544444221011 is a wasteful number, since it uses less digits than its factorization.

123544444221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461515621.

The product of its (nonzero) digits is 122880, while the sum is 38.

Adding to 123544444221011 its reverse (110122444445321), we get a palindrome (233666888666332).

The spelling of 123544444221011 in words is "one hundred twenty-three trillion, five hundred forty-four billion, four hundred forty-four million, two hundred twenty-one thousand, eleven".